Apparatus for extracting soluble substances.



W. E. GAHRIGUES.

APPARATUS FOR EXTRACTING soLUBLE SUBSTANCES.

APPLICATION FILED OCT. 3.1'9I4 Patented Oct. 22, 1918.

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APPARATUS FOR EXTRACTING SOLUBLE SUBSTANCES.

APPLICATION FILED ocT. a. 1917.

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WILLIAM E. GARRIGUES, OF NEW ORLEANS, LOUISIANA, ASSIGNOR TO WILLIAMGARRIGUEc COMPANY, INC., OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

Specification of Letters Patent.

Patented Oct. 22, 1918.

Application led October 3, 1917. Serial No. 194.479.

To all whom t may concern Be it known that I. VILLIAM 4E. GAiuu- GUEs',a citizen of the United States, residing at New Orleans, in the parishof Orleans and State of Louisiana, have invented certain new and usefulImprovements in Apparatus for Extracting Soluble Substances, of whichthe following is a specification.

My invention relates to apparatus for extracting soluble substances,such as grease, from various materials containing the same, by means ofsuitable solvents, -such, for example, as gasolene or naphtha, andrecovering the solvent.

In theprocess, practised in my apparatus the material containing thesoluble substance and the solvent are first agitated together and thesolvent with the dissolved substance drawn oif as fully as possible.This may be accomplished, for example, in a horizontal rotary extractor,running the solvent in at one end and drawing oit' the solution at theother end, through a filter, until the soluble substance is allwithdrawn. A draw-off pipe may then be connected to the bottom oftheextractor and a' considerable proportion of the remaining solventtherein drawn off.

In such an operation, a certain amount of the solvent remains within themass of material, caught between the particles thereof and adheringthereto. My invention recovers this residue by introducing hot gas,

such as steam, entirely within the mass of material, While thoroughlyagitating the masa andat the saine time providing a v`connection forcarrying oli' the hot gas or steam with the solvent volatilized by theheat thereof. This operation may be carried out in a horizontal rotaryextractor by rotating the same. and connecting it exially to a condenserand vacuum-pump, while at the same time introducing steam into the massof material in the vessel. This may be done, for example, by theprovision of a plurality of perforated steampipes withinA the extractorand a valve so'constructed to alwaysdelivei steam into the lower pipes,

also be located within the extractor, to obtain the best results, toprevent condensation of the steam in the mass of material.

In order that my invention may be more a horizontal rotary extractor,such as that' 'illustrated at 1, which may be provided with peripheralrails 2 and 3, which rest in contact with rollers, such 4, 4 and 5, theextractorha'ving a driving gear which meshes with a driving pinion 7.Suitable manholes and covers therefor, S, are provided foifilling theextractor, and a suitable screen is provided at one end, -which maycomprise a perforated plate with a brass wire screen and filter-cloth,illustrated, generally, at 9, retained by means of, a suit-ableretaining ring 10. An cud nienibcr 11 is provided beyond the screen.having an axial opening therein. to which is connected a pipe 12provided with a valve, such as the gate-valve 13 shown. The pipe 12 isconnected, through a stuffing-box indicated at 14, to a connection 15provided with a valve, such as the gate-valve 1G, leading to acondenser, and, when soine types of condenser are used, to a vacuumpump.

-A suitable' draw-ofi' connection is indi-y cated at 17, having acoupling 18 adapted to be connected to a nipple 19 provided with a valve19, and connected to the lower portion of the space 20fbetween thescreen 9 and end 11 of the extractor when the latter is not rotating.Connection 17 may be connected through a T 21 to a still (not shown) forthe naphtha or other solventnsed. A connection 22, provided with lavalve 23, may also be provided, extending from T 21 tothe condenserconnection 15.

The solvent may be introduced axially into the extractor atdthc oppositeend of the apparatus through a pipe 24: provided With valve 24', T 25and pipe 25. This pipe 25 extends a short distance within the endclosure 26 of the extractor and is surrounded by a valve constructioncomprising an inner cylindrical member 27 secured to pipe 25 at itsouter end by a bushing 28, which may be screwed on the pipe. At theother end of member 27, a radially extending, portion 29 is secured topipe 25', as by a threadedconnection, an annular space 30 being providedabout pipe 25 between bushing 28 and the opposite end closure 29 ofmember- 27.

An outer casting or member 31 lsurrounds member 27 and is provided withlugs A32 secured to the end member 26 of thecxtractor to rotatetherewith. Rotation between members 27 and 31 may be provided for by asuitable'gland 33, secured to outer valvemember 31 and provided with asuitable packing 34.

Suitablev hot gas, such-as steam, may be introduced through pipe 35,provided with a valve 36, into the space 30. A plurality of perforatedpipes 37' are provided with in the extractor, for distributing this hotgas within the mass'of material in that portion of the extractor whichis lowcrmost at any moment. Pipes 37 of any suitable number, such assix, extend longitudinally through. the extractor at suitably spacedintervals and may be secured in position by means of U-bolts 38extending about the pipes and secured to L-irons 39 lnounted on theinterior of drum 1. At the'endrot'the extractor adjacent the rotaryvalve, pipes 37 are bent radially as shown at 37 and screwed throughradial pipe taps in the outer member 31 of the valve.

The inner or stationary member 27 of the valve is cut away for a shortdistance axially thereof, at its lower portion, as shown in Fig. 3, toprovide a steam or hot gas space 40, the lower wall otl which is formedby the interior ot' the' rotary valve-member 31 and the outer walls otwhich are formed by radii of a circle making; an ang-le with each otherwhich is preferably less than 180 degrees. Pipes 37 connect with space4() when they are at the bottom ot' the drum, and are cut oil" therefromwhen 'they are in the upper portion of the drum.

A -serie's of closed heating' pipes is also preferably mounted withinthe extractor and may comprise a plurality of longitudinal pipes 41connected at the 'end distant from the rotary valve to a circular pipe42. At the opposite end', pipes 41 are bent radially inwardly,- as shownat 41'., and are tapped .through the outer memberl 3 1 of the valve toconstantly connect, by meansof an an-y nular space 43, withfthe steamspace 30 of the valve. At .return pipe 42. extends from,

i'pe 42 out through pipe 25', and, it de cred, through v a suitablestuing-box, as

shown. A.

The operationv of the described apparatus I vvalves 13 and 23 closed,and as much of the solvent drawn off through pipe 17 and T 21aspossible. Coupling 18 is now disconnected, the extractor again rotated,valve 36 opened to permit steam to How into pipes 37 and 41, and valves13 and 16 opened. Steam now flows through the perforations in the pipes37 which are for the moment lowermost, into the mass of material at 'thebottom of the extractor, those pipes 37, which are for the momentlocated in the open space above the mass of material, not delivering anysteam into such space. The closed system of pipes 141-42 will also befilled with steam and thereby heated, preventing the condensation of thesteam in the material. The constant turning over or agitation of thematerial permits the permea- K tion of the entire mass by the steam andthe occur it this empty space were uselessly filled V with steam.Another effect of this arrangement is also to be observed, namely, thatdis charging' the steam or hot gas within the mass ot material only,causes the vapor pressure within the mass to be greater than-that in thespace unoccupied b v the mass, so that the gas, with the velatilizedsolvent .and any particles of the same which may remain liquid.entrained therein, will rapidly rise from the mass and escape throughconnection 12.

1t will be noted that myinvention is not limited to the details ofmechanism described, but that the same is as broad as is indicated bythe accompanying claims. The chief point of novelty in my describedprocess, carried out by apparatus of the character. described may beconsidered broadly as "consisting in removing thelast portion of. thesolvent, which it is impossible to Y wat .are .f 11.3@

and producing a condition of Vapor pressure within the mass greater thanthat in the space above the same. In the following claims, the term hotgas will be used to indicate-steam and its equivalents. Other points ofnovelty consist in a continuous operation of extraction in a horizontalrotary extractor. fresh solvent continuously flowing in duringl therotation and solution continuously being drawn off through a verticalfilter. The filter cloth is kept clean by the rotation, and the steamand vapor-'are screened as well as the liquid, thereby preventing thecarryiingr over of any solid material to pipe 12. The use of a.horizontal rotating drum has manifold advantages over a verticalextractor, including economy of power, the possibility of using a drumas long as is desired, ete.

lVhat I claim is:

l. Extracting apparatus comprising a horizontal rotary drum, spacedperforated pipes secured therein extending lengthwise thereof andradially at one end, a valve at said end having an inlet or solventtherethrough, a stationary member mounted about said inlet and having aninterior spice, Opeliing through the exterior of the member at oneportionthereof,a gasinlet connected to said space and an outer membersecured to said drum to rotate therewith, surrounding said stationarymember` and having the ends of said pipes extend therethrough, saidpipes being adapted to open into 4said space when in the rotation of thedrum they occupy the lower portion of the drum, and to cut oli'therefrom when they occupy the upper portion of the drum.

Extracting apparatus comprising a horizontal rotary drum, spacedperforated pipes secured therein extending lengthwise thereof andradially at one end, a v valve at said end having a stationary memberprovided with an interior space, opening` through the exterior at oneportion thereof,

an inlet pipe connected with said space,

and a member secured to the drum to rotate therewith, adapted to coverthe said opening in the stationary member, the ends of said pipesextending at spaced intervals through said rotatable member, andregistering with said opening when said pipes occupy the lower portionof the drum, and cut oft therefrom when they occupy the upper portion ofthe drum.

2:3. Extracting apparatus comprising a horizontal rotary drum, spacedperforated pipes and a series of closed pipes secured therein, and avalve at one end of the drum, comprising a stationary and a rotaryinember, provided with an interior space havin? an inlet pipe connectedtherewith, said closed pipes being connected to said valve to alwaysopen into said space, and said perforattal pipes being connected to saidvalve to open into said space only when they occupy the lower portion ofthe drum, during the rotation thereof.

4. Extracting apparatus comprising a horizontal rotary drum, spacedperforated pipes secured therein, and a valve at one end of the drum`comprising a stationary and a rotary member, provided with an in? teriorspace having an inlet pipe connected therewith. said perforated pipesbeing connect-ed to said valve. to open into said space only when theyoccupy the lower portion of the drum, during the rotation thereof.

llxtracting,r appa atus comprising a horizontal rotary drum having atone end a connection for introducingsolvent, and means for introducinghot gas during the rotation of the drum, only within that portion ot thedrinn which is at any/moment lowermost, and having at the other end anaxially connected outlet.

o. Extracting apparatus comprising a horizontal rotary drum having atone end a connection for introducing solvent, and means for introducinghot gas, during the rotation of the drum, only within that p0rtion of,the drun which is at any moment lower-most, ano` having adjacent theother end a filter, extending transversely of the drain and securedthereto, and beyond the filter an axially connected outlet.

This specification signed and witnessed this 25th day of September,1917.

iVlLLlAlt/l E. GAREGUES. lVitnesses Dvnn SMrrH, l. McIN'rosH.

It is hmby @mmm @mr in Lower@ Patent N. 1,282,407, granted october-2 2,

1918, upon tho pplioato'n of 'William E. Gorriguos, of New Orleans,Louisiana,

for an improvement in Appamtus for Extracting Soluble Substances, anerror appears in. the printed 'opooication frequirir'xg correction asfollows: Pogo 3, line 25, claim 1,.for the Word or read for; and thatthe said-Letters Patent should lo@ lroad with this correction thereinthat the eamo may conform to the record of the omo' in @he Potont Uco. l

Signori mol @sealed this 24th day of December, A. D., 1918a F. W. H.CLAY,

Acting Commissioner of Paten2s.

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